Perceived quality of angular resolution for light field displays and the validy of subjective assessment

Kara, Péter A.; Martini, Maria G.; Kovács, Péter Tamás; Imre, Sándor; Barsi, Attila; Lackner, Kristóf; Balogh, Tibor

doi:10.1109/ic3d.2016.7823450

Cited by 18 publications

(32 citation statements)

References 4 publications

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“…Yet it needs to be noted that in this research angular resolution was only reduced from 0.5 to 1 degree, which can be considered a borderline of toleration [14] [15] [16]. We expect that further, larger extents of reductions in angular resolution could easily reverse this ratio, as users would rather wait 1500 ms than face severe visual degradations (e.g., see Figure 2).…”

Section: Resultsmentioning

confidence: 78%

“…In our works regarding these visual phenomena [14] [16], we focused on their effects on QoE. Our initial tests called the need for extensive training phases, as naïve test participants without any prior experience with light field visualization can have a difficult time discriminating the different degrees of angular resolution, causing inconsistencies in the experimental results.…”

Section: The Concept Of Dynamic Adaptive Streaming Of Light Fielmentioning

confidence: 99%

“…First of all, our most recent work [18] pointed out the potential gain at this content angular resolution, that might compensate in the overall QoE during quality switching with both resolutions. Furthermore, prior researches [36] [14] argue whether this can be considered as a sufficiently high value for light field visualization or not.…”

Section: A Test Conditions and Video Contentmentioning

confidence: 99%

“…The test participants had to compare them in a full paired comparison test, using a 5-point discrete comparison scale. The concept that this paper addresses was initially proposed and briefly introduced in our prior publication [13], and several experiments involving subjective tests were performed to investigate the underlying perceptual thresholds and phenomena, such as the perceived angular resolution [14] [15] [16], spatial resolution [17] and the interdependence between them [18]. The tests in these experiments used still content for quality evaluation purposes.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Concept of Dynamic Adaptive Streaming of Light Field Video

Kara

Cserkaszky

Martini

et al. 2018

IEEE Trans. on Broadcast.

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Abstract-Light field visualization has progressed and developed significantly in the past years. At the time of this paper, light field displays are utilized in the industry and they are commercially available as well. Although their appearance on the consumer market is approaching, many potential applications of light field technology have not yet been addressed, such as video streaming. In this paper, we present our research on the dynamic adaptive streaming of light field video. In order to evaluate the presented concept of quality switching, we carried out a series of subjective tests, where test participants were shown light field videos containing stallings and switches in spatial and angular resolution.

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Section: Resultsmentioning

confidence: 78%

Section: The Concept Of Dynamic Adaptive Streaming Of Light Fielmentioning

confidence: 99%

Section: A Test Conditions and Video Contentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of the Concept of Dynamic Adaptive Streaming of Light Field Video

Kara

Cserkaszky

Martini

et al. 2018

IEEE Trans. on Broadcast.

Self Cite

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“…The evaluation is performed on several viewpoints extracted from LF contents and displayed as still images alongside with their uncompressed references, using a methodology based on Double Stimulus Continuous Quality Scale (DSCQS). Darukumalli et al and Kara et al investigate the quality of experience associated with LF displays, and its relationship with angular resolution and zooming levels [3], [4]. To do so, they use ACR and Degradation Category Rating (DCR).…”

Section: Introductionmentioning

confidence: 99%

Impact of interactivity on the assessment of quality of experience for light field content

Viola

Řeřábek

Ebrahimi

2017

2017 Ninth International Conference on Quality of Multimedia Experience (QoMEX)

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Abstract-The recent advances in light field imaging are changing the way in which visual content is captured, processed and consumed. Storage and delivery systems for light field images rely on efficient compression algorithms. Such algorithms must additionally take into account the feature-rich rendering for light field content. Therefore, a proper evaluation of visual quality is essential to design and improve coding solutions for light field content. Consequently, the design of subjective tests should also reflect the light field rendering process. This paper aims at presenting and comparing two methodologies to assess the quality of experience in light field imaging. The first methodology uses an interactive approach, allowing subjects to engage with the light field content when assessing it. The second, on the other hand, is completely passive to ensure all the subjects will have the same experience. Advantages and drawbacks of each approach are compared by relying on statistical analysis of results and conclusions are drawn. The obtained results provide useful insights for future design of evaluation techniques for light field content.

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Angularly continuous light‐field format: Concept, implementation, and evaluation

et al. 2019

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In this paper, we present the concept, the implementation, and the evaluation of our novel angularly continuous light-field format. We compared the subjective visual performance of our format with the perspective camera format through a series of subjective and objective tests. In our extensive subjective study, we used multiple absolute and comparative rating scales and various visual stimuli with different contents and angular resolutions. The perceived quality was assessed by a total of 36 test participants, who were separated based on their scientific expertise. The objective quality was evaluated through the degradations caused by three well-known compression methods. The obtained results indicate that our light-field format may outperform the conventional format, and it generally can provide at least equivalent visual quality. Furthermore, these findings open the way for data size optimization, without compromising the achieved level of perceived quality.

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Perceived quality of angular resolution for light field displays and the validy of subjective assessment

Cited by 18 publications

References 4 publications

Evaluation of the Concept of Dynamic Adaptive Streaming of Light Field Video

Evaluation of the Concept of Dynamic Adaptive Streaming of Light Field Video

Impact of interactivity on the assessment of quality of experience for light field content

Angularly continuous light‐field format: Concept, implementation, and evaluation

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